The chartr() function in R language translates the characters in character vectors, particularly from upper to lower case or vice versa. The chartr() function is used to substitute characters of a string.
R chartr() Function
The chartr() is a built-in R function that is used to do string substitutions. The chartr() function replaces all the matches of the existing characters of a string with the new characters specified as the argument.
chartr(old, new, x)
old: The old string to be substituted.
new: It is the new string.
x: It is a target string.
The chartr() function translates each character in x specified in old to the corresponding character set in new.
Let’s define a character vector and replace one character with another character. The chartr() is case sensitive function.
data <- "Expecto Patronum" chartr("P", "M", data)
 "Expecto Matronum"
You can see that capital P is replaced by capital M. The small p in Expecto is as it is.
So, the chartr() function is useful when replacing a character in the R string.
That is it for chartr() function in R.